Relating to those mammals ( e.g., humans, dogs, rodents) that shed maternal uterine tissue when expelling the placenta at birth, in contrast to indeciduate mammals (horse, pig). [see deciduation]
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de·cid·u·ate di-'sij-ə-wət adj having the fetal and maternal tissues firmly interlocked so that a layer of maternal tissue is torn away at parturition and forms a part of the afterbirth
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de·cid·u·ate (də-sidґu-āt) characterized by shedding.Medical dictionary. 2011.